Avoid spinning up DocumentsProviders at boot.

Bug: 27743087
Change-Id: Ia89465c5d13a74f3b78a0d84f1ecfe5fd2a6e744
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 6fe239e..a4acf7e 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -107,7 +107,7 @@
             </intent-filter>
         </receiver>
 
-        <receiver android:name=".BootReceiver">
+        <receiver android:name=".BootReceiver" android:enabled="false">
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED" />
             </intent-filter>